:global{
  @keyframes showTop {
    0% {opacity:0}
    100% {opacity: 1}
  }
  @keyframes hideTop {
    0% {opacity:1}
    100% {opacity: 0}
  }
  .mi-back-top{
    position: fixed;
    right:20px;
    bottom:60px;
    width:40px;
    height:40px;
    text-align: center;
    background: rgba(0,0,0,0.4);
    z-index:999;
    border-radius: 50%;
    &.enter{
      animation: showTop___39SR0 0.3s ease;
    }
    &.leave{
      animation: hideTop___3tobm 0.3s ease;
    }
    img{
      width:14px;
      height:16px;
      margin:12px auto;
    }
  }
}